﻿//图片查看
$(".commentImg").children("img").click(function () {
    var hideView = $(this).parent().parent().next();
    $(hideView).slideDown("slow");

});

function rotate(id, angle, whence) {
    var p = document.getElementById(id);
    if (!whence) {
        p.angle = ((p.angle == undefined ? 0 : p.angle) + angle) % 360;
    }
    else {
        p.angle = angle;
    }
    if (p.angle >= 0) {
        var rotation = Math.PI * p.angle / 180;
    }
    else {
        var rotation = Math.PI * (360 + p.angle) / 180;
    }
    var costheta = Math.cos(rotation);
    var sintheta = Math.sin(rotation);
    if (document.all && !window.opera) {
        var canvas = document.createElement('img');
        canvas.src = p.src;
        canvas.height = p.height;
        canvas.width = p.width;
        canvas.style.filter = "progid:DXImageTransform.Microsoft.Matrix(M11=" + costheta + ",M12=" + (-sintheta) + ",M21=" + sintheta + ",M22=" + costheta + ",SizingMethod='auto expand')";
    }
    else {
        var canvas = document.createElement('canvas');
        if (!p.oImage) {
            canvas.oImage = new Image();
            canvas.oImage.src = p.src;
        }
        else {
            canvas.oImage = p.oImage;
        }
        //alert(canvas.width)
        canvas.style.width = canvas.width = Math.abs(costheta * canvas.oImage.width) + Math.abs(sintheta * canvas.oImage.height);
        canvas.style.height = canvas.height = Math.abs(costheta * canvas.oImage.height) + Math.abs(sintheta * canvas.oImage.width);
        var context = canvas.getContext('2d');
        context.save();
        if (rotation <= Math.PI / 2) {
            context.translate(sintheta * canvas.oImage.height, 0);
        }
        else if (rotation <= Math.PI) {
            context.translate(canvas.width, -costheta * canvas.oImage.height);
        }
        else if (rotation <= 1.5 * Math.PI) {
            context.translate(-costheta * canvas.oImage.width, canvas.height);
        }
        else {
            context.translate(0, -sintheta * canvas.oImage.width);
        }
        context.rotate(rotation);
        context.drawImage(canvas.oImage, 0, 0, canvas.oImage.width, canvas.oImage.height);
        context.restore();
    }
    canvas.id = p.id;
    canvas.angle = p.angle;
    p.parentNode.replaceChild(canvas, p);
}

//向右旋转
function rotateRight(id, angle) {
    rotate(id, angle == undefined ? 90 : angle);
}
//向左旋转
function rotateLeft(id, angle) {
    rotate(id, angle == undefined ? -90 : -angle);
}

//收起
function hideView(t) {
    $(t).parent().parent().hide();
};